Oh I'm not referring to impaction. I used cypress mulch and aspen before, and sometimes the aspen would get stuck in the mouth while trying to get the rodent in it's mouth, and it would need to readjust.. This made watching my snake eat take longer lol. It's partially why I switched to paper towels.
As far as impaction goes, a snake in the wild probably ingests a bunch of things lying on the ground. That's not my concern.